检索结果-内蒙古大学图书馆

44th Annual Meeting of the Cognitive Science Society: Cognitive Diversity, CogSci 2022

作者： Duggins, Peter Eliasmith, Chris Stewart, Terrence C. Computational Neuroscience Research Group Department of Systems Design Engineering University of Waterloo Canada

Social environments often impose tradeoffs between pursuing personal goals and maintaining a favorable reputation. We studied how individuals navigate these tradeoffs using Reinforcement Learning (RL), paying particular attention to the role of social value orientation (SVO). We had human participants play an interated Trust Game against various software opponents and analyzed the behaviors. We then incorporated RL into two cognitive models, trained these RL agents against the same software opponents, and performed similar analyses. Our results show that the RL agents reproduce many interesting features in the human data, such as the dynamics of convergence during learning and the tendency to defect once reciprocation becomes impossible. We also endowed some of our agents with SVO by incorporating terms for altruism and inequality aversion into their reward functions. These prosocial agents differed from proself agents in ways that resembled the differences between prosocial and proself participants. This suggests that RL is a useful framework for understanding how people use feedback to make social decisions. © 2022 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY)

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

The Price of a Safe Flight: Risk Cost Based Path Planning

The Price of a Safe Flight: Risk Cost Based Path Planning

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Aliaksei Pilko Andy Oakey Mario Ferraro James Scanlan Computational Engineering and Design Group University of Southampton Southampton UK Transportation Research Group University of Southampton Southampton UK

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

A risk aware UAS path planning methodology is proposed using monetary value as the sole cost metric. A third party ground risk model is used to generate a non-uniform costmap for a modified A* heuristic search. The Value of a Prevented Fatality provides a basis to convert fatality risk to monetary value terms as a Human Value at Risk (HVaR) measure. Additional operating and UAS Capital Value at Risk (CVaR) costs are modelled to provide a holistic monetary cost model for path cost minimisation. A number of future cost variants are investigated based upon prior work for a realistic urban-rural mix logistics case study in Southern England. Results show increasingly risk averse paths with decreasing future UAS operating costs.

关键词： Measurement Reactive power Costs Probabilistic logic Minimization Path planning Robotics and automation

来源：评论

学校读者我要写书评

暂无评论

Development of nonlinear control strategies for a fully electric high-speed passenger vessel

Development of nonlinear control strategies for a fully elec...

引用

IEEE Colombian Conference on Automatic Control (CCAC)

作者： Felipe Mendoza Juan David Núñez Tatiana Manrique Ricardo Mejía-Gutiérrez Design Engineering Research Group (GRID) Universidad EAFIT Medellín Colombia Computational Intelligence and Automatics Research Group (GIICA) Universidad EIA Envigado Colombia EnergEIA Research Group Universidad EIA Envigado Colombia

Vessel electrification presents itself as a low-fuel consumption solution for inland waterways transportation. However, electric vessels must cope with challenges regarding the limited energy available in the batteries and how to use it properly to achieve the route to cover. As an energy management strategy, velocity control is proposed for a twelve-passenger electric vessel covering the Magangué-Pinillos-Conyongal route in Magdalena River, Colombia. Velocity control of vessels faces many challenges due to vessel hydrodynamics nonlinearities and uncertainties. The present work evaluates several nonlinear velocity control strategies, such as Gain-scheduling Model predictive control, Adaptive Model predictive control, and Sliding mode control. Dynamics uncertainties are not considered. From the results obtained, it can be established that the Sliding mode control (SMC) is the simplest to implement and has the best performance regarding energy consumption. Next, the Gain-scheduling control approach is smoother than the SMC but requires more computational effort and knowledge of the system. Finally, the Adaptive approach is better at reducing errors but has the highest computational effort.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Conformational Folding Activates Photoinduced Electron Transfer

引用

CCS Chemistry 2024年第11期6卷 2804-2813页

作者： Shiqing Huang Syed Ali Abbas Abedi Zhifeng Li Rongrong Huang Xiaoyu Yan Mohammad Izadyar Qinglong Qiao Yu Fang Zhaochao Xu Xiaogang Liu Fluorescence Research Group Singapore University of Technology and DesignSingapore 487372 School of Chemistry and Life Resources Renmin University of ChinaBeijing 100872 CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 Research Center for Modeling and Computational Sciences Faculty of ScienceFerdowsi University of MashhadMashhad *** Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education) School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’anShaanxi 710119

Photoinduced electron transfer(PET)is a critical process in many functional materials,underpinning various technological applications(i.e.,fluorescent probes and photocatalysts).Despite its signifi-cance,the detailed structural dynamics of PET,particularly during the excited state,remain poorly *** study investigates the mechanisms of conformational folding and their implications for activating PET in molecular systems characterized by a fluorophore-spacer-receptor *** demonstrate that traditional computational models,primarily based on frontier molecular orbitals,often fall short in capturing these conformational dynamics,leading to inadequate explanations of PET *** the incorporation of conformational folding,our computational model has achieved excellent agreement with experimental data,thereby resolving several long-standing debates on PET *** mechanistic advancement not only deepens our understanding of PET but also opens new avenues for designing advanced functional *** have thus successfully demonstrated the imaging of lysosomes in live cells using a PET probe.

关键词： Photoinduced electron transfer conformational folding bioimaging excited-state dynamics advanced materials

来源：评论

学校读者我要写书评

暂无评论

Investigation of the mesmeric effect of substituents in DSSC based on thiophene and oxadiazole. Structural and optoelectronic study using the DFT approach

引用

Interactions 2025年第1期246卷 1-15页

作者： Agda, Fatima Nebbach, Diae Louazri, Latifa Ninis, Ouafae Merimi, Imane Ajana, Mohammed Aziz Bouachrine, Mohammed Laboratory Molecular and Computational Chemistry: Design Synthesis and Reactivity. Department of Chemistry Faculty of Science Moulay Ismail University Meknes Morocco Regional Center for Education and Training Professions Meknes Morocco Energy Materials and Computing Physics Research Group ENS Abdelmalek Essaadi University Tetouan Morocco Advanced Materials and Process Engineering Laboratory Faculty of Science Ibn Tofail University Kenitra Morocco National School of Architecture National Road N2 Compus de Savoir Technolopole Oujda Oujda60000 Morocco Faculty of Sciences Mohammed First University Oujda Morocco

In this work, we have developed a range of organic Donor- π -Acceptor;we are changing the π-spacers by adding novel substitutions (F, CH3, and CN) to the base molecule D-TTOxTT-A for dye-sensitized solar cells (DSSCs). Our aim is to improve the photovoltaic performance of these engineered organic dyes. We use the B3LYP (d,p) and TD/CAM-B3LYP (d,p) to study the impact of different types of the introduction of the substitution in the spacer, on the sensitizer characteristics, with the aim of highlighting the links between structure and property. Based on these results, it is possible to use these dyes as promising sensitizers for DSSCs. In addition, M4 could be an ideal compound for high throughput DSSC due to its planar geometry, low energy gap (1.73eV), higher absorption wavelength (449.3nm), longer lifetime (2.366 ns), lower ΔGreg (-0.64 eV), large hardness (-0.869 eV) and reasonable energy reorganization (0.488eV). © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Thiophene

来源：评论

学校读者我要写书评

暂无评论

muco: A MUSIC COMPUTING LEARNING APPLICATION 19

muco: A MUSIC COMPUTING LEARNING APPLICATION

引用

19th Sound and Music Computing Conference, SMC 2022

作者： Hu, Patricia Hödl, Oliver Reichl, Peter Kayali, Fares Eibensteiner, Iris Taufner, Bernhard Schefer-Wenzl, Sigrid Miladinovic, Igor Cooperative Systems Research Group University of Vienna Austria Centre for Teacher Education University of Vienna Austria Software Design and Engineering Department University of Applied Sciences Campus Vienna Austria Institute of Computational Perception Johannes Kepler University Linz Austria

ISBN: (纸本)9782958412609

Following a computational approach to music creation can serve as a transdisciplinary bridge between computer science, music and education by providing rich opportunities for teaching computing skills in interdisciplinary contexts. Making use of such learning contexts is one of the cornerstones of STEAM (STEM + Arts) education, a pedagogic approach focusing on integrating the arts and humanities into STEM fields. Despite numerous benefits reported in the literature, the number of STEAM programs integrated into formal learning contexts remains limited due to various integration challenges. In addressing these challenges, we developed and evaluated a gamified music computing learning application called muco, using the MVC software architecture along with React as the front-end, and Node and MariaDB as back-end technologies. The goal of the application is to make programming concepts more accessible and comprehensible to a broader public, and to simultaneously spark interest in music and music making. Making use of game mechanics, muco is conceptualised to teach computational thinking, and more specifically, introductory programming, in non-formal learning contexts. The usability of the application and impact of interdisciplinary learning is evaluated by means of both formative and summative testing. Results show that the application provides an engaging learning environment which encourages the exploration of both the computing and music domain. Copyright: © 2022 Hu P. et al.

关键词： Application programs

来源：评论

学校读者我要写书评

暂无评论

computational Thermodynamics and Microstructure Simulations to Understand the Role of Grain Boundary Phase in Nd-Fe-B Hard Magnets

引用

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2022年第Supplement期69卷 S63-S73页

作者： Koyama, Toshiyuki Tsukada, Yuhki Abe, Taichi Department of Materials Design Innovation Engineering Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya464-8601 Japan Computational Structural Materials Group Research Center for Structural Materials National Institute for Materials Science 1-2-1 Sengen Tsukuba305-0047 Japan

To control the coercivity of Nd hard magnets efficiently, the thermal stability of constituent phases and the microstructure changes observed in hard magnets during thermal processes should be understood. Recently, the CALPHAD method and phase-field method have been recognized as promising approaches to realize phase stability and microstructure developments in engineering materials. Thus, we applied these methods to understand the thermodynamic feature of grain boundary phase and the microstructural developments in Nd-Fe-B hard magnets. The results are as follows. 1) The liquid phase is a promising phase for covering the Nd2Fe14B grains uniformly. 2) The metastable phase diagram of the Fe-Nd-B ternary system suggests that the tie line end of the liquid phase changes drastically depending on the average composition of Nd. 3) The Nd concentration in the grain boundary phase can reach 100 at% if the volume fraction of the grain boundary phase is constrained. 4) The effect of Cu addition to the Nd-Fe-B system on the microstructural morphology is reasonably modeled based on the phase-field method. 5) The morphology of the liquid phase can be controlled using phase separation in the liquid phase and the grain size of Nd2Fe14B phase. ©2022 Japan Society of Powder and Powder Metallurgy.

关键词： Phase diagrams

来源：评论

学校读者我要写书评

暂无评论

The Preferred Adsorption Sites and Catalytic Mechanism of Fcc_Cofeganizn Multi-Principal Element Alloy for Oxygen Evolution Reaction Catalysis Based on Site Preference of Constituent Atom on Sublattice

SSRN

引用

SSRN 2023年

作者： Wu, Bo Weng, Liangji Su, Longju Xu, Nengshen Qian, Cheng Cai, Qi Chen, Rong Liu, Yang Zhao, Yan Zhang, Chubo Zhao, Panhong Qiao, Yang Zhang, Haifeng Wen, Cuilian Ali, Hamid Sa, Baisheng Yang, Li Su, Hang Yuan, Pei Multiscale Computational Materials Facility & Materials Genome Institute School of Materials Science and Engineering Fuzhou University Fuzhou350100 China Materials Design and Manufacture Simulation Facility School of Advance Manufacturing Fuzhou University Jinjiang362200 China China Iron & Steel Research Institute Group Beijing100081 China Fuzhou University University Park Fuzhou350100 China

The origin of distinguished oxygen evolution reaction (OER) catalytic properties of multi-principal element alloys (MPEAs) is not clear yet due to the rich surface-active sites may exist in MPEAs composed of multiple types of elements, which may bring complex catalytic environment. In this work, four main steps were carried out using computational materials science. The atom distributing configuration of bulk MPEAs was constructed firstly based on the previously predicted site preference of atoms occupying on sublattices, which is beyond the traditional hypothesis that the atom distributing randomly on the whole lattice. Then the (111) close-packed surface slab of CoFeGaNiZn MPEA was obtained by cleaving the bulk structure. Subsequently, the OER processes were systematically explored by calculating the free energy change and site transitions of intermediates *OH, *O, and *OOH at 171 active sites on the (111) surface. Finally, the oxygen evolution reaction catalytic mechanism and site preference behavior for OER catalysis of FCC_CoFeGaNiZn MPEA were discussed in detail. The results show that atoms have obvious site preference, which deviating the ideal randomly distribution, especially Fe, Zn and Co atoms always prefer to 3c sublattice at all temperature, Ga atoms tend to favor 1a sublattice, and the site preferences of Ni atoms and Ga atoms are affected by the heat treatment temperature. At 1273 K, the site occupying configuration is (Co0.0246Fe0.01680Ga0.4550Ni0.4990Zn0.0046)1a (Co0.2580Fe0.2610Ga0.1150Ni0.1000Zn0.2650)3c. For the (111) surface of FCC_CoFeGaNiZn MPEA based on the site occupying configuration at 1273 K, which was then supposed to quenched to ground state, the adsorbed O atoms prefer to occupy each hollow site, which hampers their participation in the catalytic reactions. Three intermediates were found to primarily participate in the catalytic reaction on top sites. In addition, there are no scaling relationships between ΔGOH and ΔGO for CoFeGaNiZn M

关键词： Atoms

来源：评论

学校读者我要写书评

暂无评论

Data-driven Bayesian inference for stochastic model identification of nonlinear aeroelastic systems

Research Square

引用

research Square 2023年

作者： McGurk, Michael Lye, Adolphus Renson, Ludovic Yuan, Jie Aerospace Centre of Excellence University of Strathclyde GlasgowG1 1XJ United Kingdom Singapore Nuclear Research and Safety Initiative National University of Singapore Singapore Dynamics Group Imperial College London South Kensington Campus LondonSW7 2AZ United Kingdom Computational Engineering Design Group University of Southampton SouthamptonSO17 1BF United Kingdom UK Aerospace Centre of Excellence University of Strathclyde GlasgowG1 1XJ United Kingdom

The objective of this work is to propose a data-driven Bayesian inference framework to efficiently identify parameters and select models of nonlinear aeroelastic systems. The framework consists of the use of Bayesian theory together with advanced Kriging surrogate models to effectively represent the limit cycle oscillation response of nonlinear aeroelastic systems. Three types of sampling methods, namely Markov Chain Monte-Carlo, Transitional Markov Chain Monte-Carlo, and the Sequential Monte-Carlo sampler, are implemented into Bayesian model updating. The framework has been demonstrated using a nonlinear wing flutter test rig. It is modelled by a two-degree-of-freedom aeroelastic system and solved by the harmonic balance methods. The experimental data of the flutter wing is obtained using control-based continuation techniques. The proposed methodology provided up to 20% improvement in accuracy compared to conventional deterministic methods. Transitional Markov Chain Monte-Carlo was identified as the optimal choice of the sampling method for stochastic model identification. In selecting alternative nonlinear models, multi-modal solutions were identified that provided a closer representation of physical behaviour suggesting the mathematical model requires further modification. © 2023, CC BY.

关键词： Stochastic models

来源：评论

学校读者我要写书评

暂无评论

Evaluation of critical experiments in the university of Wisconsin nuclear reactor (UWNR) with uncertainty quantification

Evaluation of critical experiments in the university of Wisc...

引用

2020 International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020

作者： Park, Young-Hui Cheng, Ye Elzohery, Rabab Wilson, Paul P.H. Roberts, Jeremy A. DeHart, Mark D. Computational Nuclear Engineering Research Group Department of Engineering Physics University of Wisconsin-Madison 1415 Engineering Drive MadisonWI53705 United States Computation and Optimization for Reactor Physics Simulation Group Department of Mechanical and Nuclear Engineering Kansas State University 3002 Rathbone Hall ManhattanKS66506 United States Reactor Physics Analysis and Design Department Idaho National Laboratory Idaho FallsID83415 United States

ISBN: (纸本)9781713827245

An improved computational model of the University of Wisconsin Nuclear Reactor (UWNR) was developed to support the benchmark evaluation of recent data acquired during an experimental campaign conducted at UWNR. Previous efforts led to a scripted UWNR model for automated generation of MCNP6 and Serpent inputs. This capability was extended to SCALE/KENO. All three tools were used to evaluate a variety of zero-power, fresh-critical configurations, and the results agreed well. The MCNP6 model was extended to support shuffling the core configuration, which allows the modeling of burnup for evaluation of depleted critical configurations. The MCNP6 model successfully predicts core reactivity over time, after accounting for the initial reactivity bias. The inclusion of SCALE/KENO input generation enables sensitivity and uncertainty analyses using the TSUNAMI and Sampler modules of SCALE. A preliminary uncertainty analysis was performed with TSUNAMI for nuclear data uncertainties while direct perturbation calculations were performed using MCNP6 for geometry and material uncertainties, which helped to identify model parameters with the largest effect on the eigenvalue. A transient UWNR transport Model in Mammoth/Rattlesnake is under development to simulate the transient experiments. The existing MCNP6 and Serpent models are used to provide the CAD file for meshing and homogenized cross-sections. In conclusion, the evaluation of UWNR benchmark data provides increased confidence in various states of the UWNR computational model and will provide a unique model for use by other analysts. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://***/licenses/by/4.0/).

关键词： Uncertainty analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：